I wouldn't mind a Lucario evolution, I see it as the gen 4 Togepi having a baby stage and then evolving by happiness. Togepi got a final evolution 2 generations after gen 2 so maybe Riolu will get a final evolution this generation...I know that the Zoroark speculation really made me want a Lucario evolution, some of the fake lucario evolution art that came out of that was cool, hope it looks something similar to that.